Design & Simulation of High Frequency Gate Driver Circuit for Synchronous Buck Converter

• Main Authors: Yahaya, Nor Zaihar, awan, mohammad, Begam , Mumtaj
• Format: Conference or Workshop Item
• Published: 2008
• Subjects: TK Electrical engineering. Electronics Nuclear engineering
• Online Access: http://eprints.utp.edu.my/6713/1/Paper_%5B08-a%5D.pdf; http://eprints.utp.edu.my/6713/
• Institution: Universiti Teknologi Petronas

This paper proposes a new improvement of gate driver circuit for high frequency switch in a synchronous buck converter application. At very high frequency, the effect of gate driver on overall performance of converter becomes more critical. The best selections of Power MOSFETs combined with a resonant technique are used in the design. A new resonant gate driver circuit utilized a coupled inductance of linear transformer operating in 1 MHz switching frequency is proposed. A circulating current in charging and discharging via this coupled inductance allows for a highly energy efficient and fast operation of the Power MOSFET. PSpice simulation of proposed resonant gate driver circuit has been constructed to validate the operation and performance analysis. Simulation results show that the total power losses of the proposed gate driver circuit is reduced by at least 1.7 % and an increase in the switching speed of 6 %.